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superdad88 |
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Newbie ![]() Group: Members Posts: 23 Joined: 24-June 11 From: omaha,ne Member No.: 13,238 Region Association: Upper MidWest ![]() |
![]() ![]() ![]() ![]() ![]() Ok here are the pics of the car that I am going to buy. I worked on getting it running and I believe I think I know what's wrong with it. I wasnt getting any spark to the spark plugs. So I traced it all the way back to the MSD. I believe the MSD is bad but wanted to ask you guys for sure before I go and spend 300 bucks. There is a gold box to the right of the MSD, not sure what this is. I did check the transformer and I am getting voltage from there. I checked the MSD as per their website and from what I can tell its not providing spark. But what is the gold box? Wanted to make sure it might be something simple and I am missing it before I spent the 300 bucks. |
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Prospectfarms |
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#2
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Member ![]() ![]() Group: Members Posts: 495 Joined: 7-March 11 From: Louisville, KY Member No.: 12,801 Region Association: Upper MidWest ![]() |
Kg6dxn wrote:
"Here is the basic MSD wiring. If you take the trigger input and put it to the output and remove the MSD you will prove or disprove the MSD working." Would you mind restating that?: Is the "trigger input" the + or - wire described as the "original coil wire" on the diagram? What/where is the trigger "output" you've referenced? I think you're suggesting he disconnect the four main wires coming from the MSD, then reconnect the "original coil wires" to the coil? Would that be sufficient to get a spark at a plug assuming the remaining components are operating? Could someone tell Superdad88 (and me) what they think the after marked parts in his ignition system consists of? For example, it sounds to me like there is an optical trigger in the distributor that is controlled by electronic timing which fires some sort of CDI (gold box?) That's just a shot in the dark since I've never used any of those. Thanks. BTW, superdad, nice looking car! |
ArtechnikA |
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#3
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rich herzog ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None ![]() |
Would you mind restating that?: It's stated pretty plainly on the MSD diagram, but to 'revert', you'd take the wires from the MSD attached the coil and remove them. Then take the 'original coil wires' and reattach them to the coil. Switched +12 from the ignition to Terminal 15 (+). Wire from the points to Terminal 1 (-). QUOTE I think you're suggesting he disconnect the four main wires coming from the MSD, then reconnect the "original coil wires" to the coil? yes.QUOTE Could someone tell Superdad88 (and me) what they think the after marked parts in his ignition system consists of? For example, it sounds to me like there is an optical trigger in the distributor that is controlled by electronic timing which fires some sort of CDI (gold box?) The parts of the puzzle are in the thread but not all the dots are connected... The gold box is a points replacement. It, too, could be defective - or the actual optical trigger in the distributor. Or any of the connections could be bad... Basically - two wires from the gold box talk to the optical trigger unit in the dizzy. It'll also have power and ground. And an output wire that acts just like the wire from the points. This is now "original points wire" if you're an MSD. For all those connections, the MSD hookup is simple, like it shows. High-current power and good ground. Two wires to coil to make spark. One wire from the points. And what used to be switched +12 basically becomes a 'power switch' for the MSD. Complicated only slightly by the fact that it's also the +12 for the points replacement module (gold box). The MSD can be tested independently. Power on, intermittently ground the 'points wire.' You should make sparks. The points replacement can also be tested separately with a meter. |
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